Federal direct subsidized loans are based on financial need. The federal government pays the interest during in-school, grace and deferment periods. Federal direct unsubsidized loans are not based on financial need, and the federal government does not pay the interest for these loans. Students may choose to defer interest payments until repayment begins; however, the student is responsible for all interest that accrues.
1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
:Tumors of the throat, tongue, and larynx (voice box) are usually (but not always) associated with long-time use of tobacco and alcohol. Sore throat and difficulty swallowing, sometimes with pain radiating to the ear, may be symptoms of such a tumor.